Thermostatically-controlled valve



me 1 192s.

A. E. PAIGE THERMOSTATICALLY CONTROLLED VALVE Filed April 16, 1925 2 Sheets-Sheet 1 June 1 1926. 1,587,177

A. E. PAIL 2a.;

THERMOSTATICALLY L'UNTROLLLD VALVE 2 Sheets-Sheet LT till Patented June I, 1926.

iJNllED STATES PATENT OFFICE.

THERMOSTATICALLY-CONTROLLED VALVE.

Application filed. April 16, 1925. Serial No. 23,481.

catorv puppet elements having stems in axial t =lesropi 3 relation, or anger! in eontrol respective main and auxiliary ports. finch, \alv are designed and adapted for use in connection with a water heater included in a house Wet e1 supply system and comprising a container which is a hot Water reser voir; with the object and etlect of regulating the leo'iperature of the water stored in said (July :1. small consum 'ition is required to maiulain a. pri'ideterniiued temperature of the Sli l'ill Water, until hot avatar is with (ham. lherelrom and replaced by cold water, whereupon, 1 relatively large consumption of gas liiliill'till to quickly regain the loss of heat and restore the Water to the predeten mined teni wrature. Therefore, it is char acteri 't c of my invention that means are provided to normally minutely regulate a small volume of gas passing to a burner in such liea -.r llltl to temporarily permit the passage of a much larger volume of gas to the eanw burn r. In other words; an 0hjert and rile-l f my invention is to provide both a come a fine adjustuu-nt and regulation of the flow of gas to the some burner; alth ugh in the form of my iuvenlion heroin disclosed, the burner includes a plurality of iiume orifices.

As hereinafter described, my invention includes the combination with a water (301% tain r; of a burner arranged to heat the water in said mntainor; a main gas valve i 'int ining a main fuel gas conduit. leading in Ill burner; a bypass conduit leading to Av d burn -r through said Illuill valve (inall. cmluntly of the control of the latter); an iuzxiliary valve controlling said bypass mlu t; a wring arral'iged to normally close 5.1m main alve; :1 spring tending to close said ririiiliuly valve: :1 Single thermostatic element. (un nding in said container. and in operative relation with both said valves, arranged to continually hold said auxiliary valve open to a variable extent, and thereby vary the ellective area of Said bypass, in acrordzmcc with the temperature of the Water in said container, and arranged to open said main valvc at a predetermined temperature, and permit said main valve to be closed, by

its spring, at a predetermined temperature; whereby the heating efl'ect of said burner is automatically determined and controlled to regulate the temperature of the water in Said container and compensate for fluctuations in such temperature, consequent upon Withdrawal of hot water and influx of cold water with respect to said container.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

In said drawings: Fig. I is a diagrammatic perspective view of a gas water heater embodying my improvements.

Fig. H is a full size outer end view of the casing of the thermostatically controlled valve mechanism indicated in Fig. I.

Fig. Ill is a fragmentary plan view of said valve casing and its appurtenances.

Fig. lIV is a sectional view, taken on the line IV, 1V in Fig. II, showing a construclion of said valve casing and the thermostath rally controlled valve mechanism contained therein, including a main valve and an auxiliary valve in coordinated relation.

Fig. V i a diametrical sectional view of a modified form of main valve and an auxiliary valve in coordinated relation.

Fig. VI. is a (liametricul sectional view of another modified form of main valve and auxiliary valve in coordinated relation.

l ig. VII is an enlarged fragmentary radial sectional view showing the characteristic construction and arrangement of the circum ferentiul flange element of the valves and valve seats shown on a smaller scale in Figs. IV. V and VI.

Referring to Fig. I; the cylindrical tubular casing shell 1 has the door in its circumference, aflfording access to the burners 3 and t mounted Within the burner compartment 5 in said shell- Said burner compartment is formed by the skirt portion 7 of said shell extending below the partition and including the opening for said door. Said partition 8 forms the bottom closure of the water container compartment 9 in said shell, which has the top closure 10. The flue pipe 12 for the escape of products of combustion from said burner 3 extends through said water compartment 9, parallel with the axis of said casing, but in eccentric relation thereto, and is conveniently rigidly connected with said closures 8 and by Welded joints. Said artition 8 has the axial screw threaded opening 13 for the hot water inlet pipe 14 extending upwardly from the water spreader '15, which is interposed hctwcen said hurncr 3 and said partition 8 and has the. axial flange 16 provided with an external screw thread fitted in said open iug 13. The pipe 17. which is rigidly con ncctcd with the top closure 10 of said water conlaincr 9, extends nearly to the hottom closult 8 of said container so as to supply the latter with cold water 18 from a municipal or other source.

Of course. any water heated in the struc ture ahovc described is correspondingly expandel and tends to rise to the top of said container 9; while the relatively cold water 18 gravitatcs into said spreader through the axial pening within said flange 16 and is distributed radially outward by a diaphragm in said spreader so lhat. it reaches the bottom convex wall of said spreader at its outer circmn'lerrnce and graritates tht-ncc dmlnwardly toward the center of said spreatler.

Tho construction and arrangement of said spreader 15 are such that the cold water thus llowing into said spreader at the perlln etcr thereof. is heated so as to rise in said axial hot water pipe ll which extends nearlv to the top of said container 9, so that hot water rising through said pipe. it may he almost directly drawn off through thepipe 23 which leads to the dispensing faucots.

()l rour expansion of the water ill within said spreadcr 11 causes precipitation of any solid matter which is normally suspcndcd and carried in the watpr. Thcrrl orc. to enable the operator to eliminate any scrip went, deposited in the spreader. which would detract from its clliciency of operation; I provide thc hottoln of the spreader with the drain pipe 28 which has the stop cook 29 exterior to said casing 1, so that, by openinn said stop cock. any sediment in the spreader may he rinsed out; with the watcr thus drawn dircctly downward therethrough.

In the form of my invention indicated in Fig. I: the burner 3 is supplied with gas through the pi -o 30, under manual con trol of the stop cock 31. but also under an toinatic control of the thermostatically operative fuel valve having the casing 38. Said casing 33 has the tubular extension .li provided with the screw thread 35 detachably titted in water-tight relation with the spud 36 in said heater shell 1; so that the thermostatic tube 38 extends horizontally in the water 18 in the container 9 but in tangential relation with a circle larger than the outside diameter of said pipe 14, so as to clear the latter.

Said valve casing 33 has the internal partition 40 with the circular main valve seat 41 thereon in coaxial relation with the plunger hearing 43 and the internally screw threaded seat 44 for the removable closure plug .45, which latter has the wrench hold it; exterior to said casing.- Said valve casing :33 also has the internally screw thread ed pipe inlet seat 48 and pipe outlet seat 49 leading from respectively opposite sides of said partition 40.

in the form of my invention shown in Figs. IV and V, the main gas valve 50 is a disk fitted to said valve seat 41 and having axial tuhular projections 51 and 52 extending from respectively opposite sides thoreo'l'; said projection 5t being a stem by which said main valve 50 is operated as hereinafter dcscrihed, and said projection 52 serving to ongagc the spiral spring 55 which is compressed between said plug anfl'said valve and normally tends to close said valve upon its seat and thus shut. oil the gas supply to Said burner .l.

Said main valve In} is arranged to he automatically operated by the thermostatic couple including said tube 38, (which is conveniently formed of a cut length of a standard size ot commercial copper pipe) and rod 57. Said rod is conveniently formed of carhon or ceramic and in contact with the cap 58 of said tube 38; said on being permanently rigidly connected to sai tuhc. conveniently by solder 58'. at the end of said tube 38 remote from said valve casing 3:2. The arrangement descrih ed is such that said rod 57 is moved axially toward said valve fill by the contraction of said tube IE8: the expansion and contraction of said rod 577 being: practically negligible within iii" range of temperatures to which said couple are subjected in the. embodiment described.

Ordinarily. it is desired to permit said main gas valve 50 to he closcd by its spring win-never the water 15 in the container 9 reaches 17 Fahrcnhcit, and to open said \LtlYO. automatically, hr the operation of said thernuistuti couple. whenever the tempcraturc of said water tails helow 170 F. That. rcsult may be attained by making said rod 57 of such length that. it contacts diroctly with the adjacent end of said valve 511 51, when the 'alve 50 is closed upon its i i 41 and the water at. a temperature of 1Ttl F. as any decrement in the temperature oi the water would cause said copper tube to c ntract and thrust said rod 57 against the valve stem 51 to open said valve 50. However, a device of that simple character is not commercially practicahle for the reason that the flame at the burner 3 would be extinguished every time said valve 50 closed, and unconsurned gas would be discharged through the burner whenever said valve 50 was thus automatically opened, unless the gas be manually lighted which, of course, would require the constant attendfill t ll

ance of an operator. Therefore, attempts have been made to solve that diificulty by providing a bypass conduit around the main valve and leading to what is termed a pilot light, viz, a small burner 4 independent of the larger burner 3, but so located with respect thereto, that it serves to ignite gas discharged through said burner 3 whenever the main valve is opened. However, those double burner structures have been found objectionable, because no provision is made therein for automatically varying the volume of gas delivered to such pilot lights in ac ordance with the temperature of the water heated, and the ressure and flow of gas not only differ in ifl'erent locations of such heaters, but fluctuate through a considerable range in any location and, consequently, it is impossible to predetermine the rate of flow of gas to such a pilot light so that it shall be sufficient to prevent such light from being accidentally extinguished and not more than is needed for heating the water. Therefore, it has been found neces sary to supply such a double burner, for an ordinary gas water heater, with an average of fifty cubic feet o,f gas per hour; a

large portion of which is wasted because the heat of its combustion is not entirely absorbed by the water and passes off with the products of combustion from the heater.

-llierefore, I provide means to automatically control the flow of all of the gas consumed whenever the valve 31 is manually opened and the initial flow of gas ignited at the burner or burners. In the form shown, the water may be heated by the single burner 3, without using said pilot burner 4, and the flow of fuel gas to that single burner is controlled not only b the main valve 50 aforesaid, but by an auxiliary valve eontrollinga bypass conduit, inde endently of the control of said main va ve; both the volume of gas admitted by said main valve and the volume of gas admitted by said auxiliary valve being automatically variably determined by the same thermostaticall operative means.

There ore, as shown in Fig. IV; I provide a b'pass conduit in said casin 33, from sai inlet to the outlet side of said partition 40, by the duct 59 extending through said main valve 50 from within said tubular projection 52 to the outside of said tubular projection 51, and provide said projection 52 with the annular seat 60 for the auxiliary valve 61, whereby said bypass conduit 59 is automatically controlled. Said valve 61 has the stem 62 extending throu h said stem 51 of the main valve 50, in te escopic relation therewith, and is provided with the boss 63, .rojecting from said valve 61 oppositely Eom said stem 62, in coaxial relation therewith, to on age the spiral spring 64 by which said va ve 61 is normally up held; that spring being compressed between said valve 61 and'the subjacent plug 45.

It is characteristic of each form of my invention that a. single thermostatic element. exemplified by said rod 57. is operativclv re lated to both the main and auxiliary valves. so that, under normal conditions ol operation, said auxiliary valve 61 is contilmally y being thrust off its seat by said rod 57;

the latter being drawn toward said valve by the contraction of said thermostatic tube 38, as thedatter is cooled by the water.

In each of the three forms of my invention chosen for illustration: the axial extent of the opening ofthc auxiliary valve at the predetermined temperature at which the main valve is permitted to close, is n'edetprmined by the relative length of the coaxial telescopically related stems of said mairrand auxiliary valves; the, ends of the stems of both valves being presented in the same plane 65, directly against the adjacent end of the thermostatic rod (as shown in said Letters Patent 1,542,573 or against the rectiftyin plunger 66, which is conveniently forme of metal and interposed between the ends of said valve stems and said rod. It is advantageous to employ such rectifying means, because it is easier to form a true surface at right angles to the axis of the rod 57 upon the metal element 66 than upon the rod itself which, as above noted, is of carbonaceous or ceramic material, and frangible,

In the embodiment of m invention shown in Fig. IV, which is the all size of a commercial structure for domestic use; the relative lengths of the stem 51 of the main valve 50 and of the stem 62 of the auxiliary valve 61 are such that when the upper ends thereof are presented in the same plane, said auxiliary valve 61 is held off its seat one-thousandth of an inch. Of course, the essential factors determining the lellective opening of said auxiliary valve 61 are, first, the variableaxial extent to which said valve is held off its seat 60, and, second, the fixed transverse extent of such opening on the low pres sure side of the valve, which is limited by the inner circumference of the valve 0 )ening which, in that form, is determine b the diameter of the inner cylindrical wall 64 of said seat 60.

I Find it desirable to have the area of contact of said valves with their respective seats as small as practicable to minimize the possibility of lodgment of particles of dust ing formed at the intersection with a coniquent variations in cal surface; variations in the axial extent of the surfacing operation caused variations in the diameter of such inner circumference of the valve contact surface and consesaid critical factor determining the etl'ective area of opening said valves. Therefore, I have eliminated the possibility for such erroneous variation in the reduction of such valves by substituting a cylindrical wall fora conical wall at the inner circumference of the contact surface. Of course, such construction and arrangement is applicable to either the valve contact surface, on the valve, or on the seat with which it cooperates. In either case, the substitution of a cylindrical surface instead of a conical surface at the boundary of the valve contact plane surface 60, (which extends at right angles to the axis of the valves}, permits variations in the axial extent of facing oil such contact surfaces without variations in the inner diame ter; which is the critical factor:detcrmining the-effective area of the valve opening, because such effective area is the product of the inner circumference of such valve contact surface and the axial extent of its separation from the opposing surface.

In Fig. IV; I prefer to define the outer limit of such valve contact plane surface of the seat 60, by the conical surface 69, formed upon said proiection 52 of said main valve 50. In Fig. IV; the auxiliary valve 61 has a more extensive plane face presented to said minimized valve contact surface on said seat 60. However, such relation may be reversed, as indicated in Fig. V, wherein the minimized valve contact glans surface is on the auxiliary valve 70, an is opposed by it more extensive plane surface on the seat 7L In the latter form, the inner diameter of the 'annular plane bearing surface of the auxiliary valve 70 becomes a critical factor in the determination of the efiective area of the opening of said valve and as shown in Fi V, is defined by the cylindrical wall 72.

giniilarlv. in the form of my inventlon shown in Fig. VI, which is that specifically,

claimed in said. Letters Patent 1,452,573,1zhe minimised valve contact plane surface 18 onthe auxiliary valve 7 4 and defined at its inner diameter by the cylindrical wall?! vThe stem 76 of that 7 alve is in teleeccpia're; .flntion with the stem '1" Si wfich has the innerdiameter of its mini- 'ii'of the main valve can? arrangement of the circumferential flange 70 element of the valve and valve'seats above contemplated; the minimized valve contact plane surface 68 has its inner diametea dethe cylindrical surface 83 an 84; thus affording a desirable mass of metal to support and prevent distortion of said minimized surface.

In each of the three forms of my invention, shown respectively in Figs. IV, V and VI, in calibration of the telescopically related main and auxiliary valve stems to insure that the auxiliary valve shall be off its seat to a predetermined axial extent, when the main valve reaches and is just closed 85 upon its seat; I find it convenient to insert a gauge plate 86 between the twovalves and to hold them respectively in close contact therewith, while grinding oh the free ends of said valve stems in a. common plane 65. 90

Of course, such gauge plate ma be a mere Washer which is fited to encircle the inner one of the two stems during that calibrating operation, but subsequently removed.

The effective area of opening valves corresponding with a. given axial movement thereof being proportionate to the inner circumference of the surface provided for the contact of the valve with its seat, as

above ex lained; and the effective area of 1 opening em'g, of course, greater with a valve of large diameter than with a valve of smaller diameter; it might be assumed that a single valve could be esigned of sufficient diameter to admit the maximum flow 106 of gas required and yet be adjustable to the minimum required. However, the axial movement is so slight that it is impossible to attain; with a single valve, the maximum flow desired and the accurate regulation re- 10 quired for the minimum flow. Therefore, it

is essential to the attainment of the effect above contemplated to employ at least two valves. Of course, two valves of the proper relative sizes might be operated by re sc 11:7

tively distinct thermostatic devices. ever. such construction andlarrangeni ent would not only double the cost of the thermostatic elements, but would failto attain the precise coordination of o eration of the 126 two vulves'which is attains by thaoperation of both valves by the same thermostatic element. Therefore, it is characteristic of each of the forms of my invention above des scribed that it includes not only two v'glvga-lflfi of respectively different capacities, blit a single thermostatic element arranged toppcrate both such valves. 7

Of course, the'tem erature lit which outer diameter defined by the conical surface '15 of said main 1 50 closes epends upon the tire effective length of said thermostatic elements 38'and 57. Therefore, in a form of my invention shown in said Letters Patent No. 1,542,573, I rovided such valve structures with individually adjustable means to, variably determine suchclosing temperature. However, it is desirable to lessen the cost of such structures by so calibrating said elements 38 and57, during their manufacture, as to ,obviate the necessity for any subsequent adjustment thereof. Therefore, I prefer to not only cut the rods 57 to a precise standard length, while maintaining them ata standard temperature; but to form lLthe seat for the closure cap 58 in said thermostatic tube element 38 after the latter is screwed into the valve casing 33, which distance is thus determined by accurate meas' urement durin the formation of said seat and at a precisely predetermined distance from said valve seat 41, and while maintaining the structure at a standard temperature; so that said cap not only serves as a water tight closure for the tube'38, but its location predetermines the temperature at which said main valve 50 shall close. conveniently made of a sheet metal unching, which is preferably com resse as a com is minted, to insure abso ute uniformity in a series of such caps, as far as the inner faces thereof are concerned, so that the position of the latter is precisely predetermined by contact of each such cap 58 with its seat in its tube 38.

However, I do not desire to limit myself to the precise'de'tailsof construetion'and arrangement herein set 'forth,;as it is obvious that various modifications may be made therein withoutdeparting from the essen-v tial features of my invention, as defined in the a pended claims.

I c aim: I

1. The combination with .a valve casing having a large main port and a smaller, auxiliary, bypass port independently leading from an inlet to an outlet in said casing; of two valves in coaxial relation respectively arranged to independently control said ports; said main valve having an annular seat for said auxiliary valve, and said bypass ort extending through said main valve, but independently of the control of the latter; the ellective area of opening of 'each of said valves being variable in accordance with the axial movement of said valves, but limited by the diameter of respective cylindrical surfaces, in coaxial relation'vvith said valves; whereby the etlective opening of said valves for any axial movement thereof is )redctermined by the diameter of said cylindrical surfaces, independently of the axial extent of said valves; closingmeans con- {innally urging said valves to close said ports; thermostatic means, including a single non'nietallic rod common to both said valves,

,structed and arranged to open both said Saidcap may be constructed and arranged to open both said valves, and permit them to he closed, by said closing means, independently of said thrrinostatic means, in accordance with changes in temperature; and a single metallic rectifying plunger interposed between said rod and stems and common to lmth 01" said stems. 2. The combination with a valve casing having a large main port and a smaller, anxiliary, bypass port independently leading from an inlet to an outlet in said casing; of two valves in coaxial relation respectively arranged to independently control said ports; said bypass port extending through said main valve, but independently of the con trol of the latter; closing means continually urging said valves to close said ports; thermostatic means, including a single nonmetallic rod common to both said valves, convalves, and permit them to be closed, by said closing means, independently of said thermostatic means, in accordance with changes in temperature; and arsin le metallic rectifying plunger interposed between said rod and stems and common to both of said stems.

8. The combination with a valve casing having a large main port and a smaller, auxiliary, bypass port independently leading from an inlet to an outlet in said casing; of two valves in coaxial relation respectively arranged to independently control said ports; said bypass port extending through said main valve, but independently of the control of the latter; closing means contin- 100 ually urging said valves to close said ports; thermostatic means, including a single nonmetallic rod common to both said valves, constructed and arranged to open both said valves, and permit them to be'closed, by said closing means, independently of said thermostatic means, in accordance with changes in temperature.

4. The combination with a valve casing having a large main port and a smaller, auxiliary, bypass port independently leading from an inlet to an outlet in said casing; of two valves in coaxial relation respectively arranged to independently control said ports; said bypass port extending through Said main valve, but independently of the control of the latter; closing means continually urging said valves to close said ports; thermostatic means, including a single nonmetallic rod common to both said valves, constructed and arranged to open both said valves, and permit them to he closed, by said closing means. independently of said thermostatic means, in accordance with changes in temperature; the effective area of opening of each of said valves being variable in accordance with the axial movement of said valves, but limited by the diameters of rcspective cylindrical surfaces in coaxial relation with said valves; whereby the etieetive 130 opening ofsaid valves for any axial move ment thereof is predetermined by the diamc ters of said cylindrical Surfaces, independently of the axial extent of said valves. I

5. The combination with a valve casing having a large main port and a smaller, auxiliary, bypass port, both leading from an inlet to an outlet in said casing; of a main valve and an auxiliary valve res ectively arranged to separately control sai ports; said main valve having said auxiliary port opening through it, and having 'a seat for said auxiliary valve; closing means continually urging said valves to close said ports; and thermostatic means, common to both said valves, constructed and arranged to open both said valves, and permit them to be closed, by said closing means, independently of said thermostatic means, in accordance with changes in temperature. 1

6. The method of coordinately calibrating multiple valve members including respective stems fitted for reciprocation in coaxial telescopic relation and respectively carrying annular disks having parallel lane valve contact faces; which consists in holding said 7 members with said faces in predetermined spaced relation, with gauging means, while reducing the ends of said stems to a common plane at a predetermined distance from said faces and at right angles to their common axis, and while maintaining said valve members at a substantially constant predetermined temperature.

7. The method of coordinately calibrating a multiple valve including respective stems fitted for reciprocation in coaxial telesco ic' relation and respectively carrying annu ar disks having valve contact faces; which consists in holding. said members with said faces in predetermined spaced relation, while reducing the ends of said stems to a redetermined common plane at right mg es to their common axis. 7

8. The method of coordinately calibrating multiple valve members including respective stems fitted for reciprocation in coaxial telescopic relation and respectively carrying valve contact faces, extending transversely to their axes; which consists in holding said disk members in predetermined relation with gauging means, while reducing the ends of said stems to a common lane, at right angles to their axes and whi e maintaining said valve members at a substantially constant predetermined temperature.

9. The method of coordinately calibrating multiple valve members including respective stems fitted-for reciprocation in coaxial telescopic relation an respectively carrying valve contact fares, extending transversely to their axes; which consists in holding said members vvithsaid faces'in predetermined relation, while reducing the ends of said stems to a common plane, transverse to their axes.

10.: The method of coordinately calibratvalve members including respective stems fitted for reciprocation m coaxial telescopic relation and respectively carrying valvecontact faces, extending transversely to their axes; which consists in holding said members with said faces in predetermined relation, hile reducing the ends of said stems to a predetermined extent.

11. The method of calibrating a thermostatically controlled valve structure which consists in providing a valve casing, having a valve seat, with a metallic thermostatic tube rigidly connected with said valve seat; forming, at the free end of said tube, a seat for a closure cap at a predetermined distance from said valve seat; while maintaining the structure at a predetermined temperature; formin a closure cap to fit said closure seat in re etermined invariable relation therewit and rigidly connecting said closure cap with said tube in immovable water-tight contact with said closure seat.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this fifteenth day of April, 1925.

ARTHUR E. PAIGE.

ing multiple opening of said valves for any axial movement thereof is predetermined by the diameters of said cyllndrical surfaces, independently of the axial extent of said valves.

5. The combination with a valve casing having a. large main port and a smaller, auxiliary, bypass port, both leading from an inlet to an outlet in said casing; of a main valve and an auxiliary valve res ectively arranged to separately control sai ports; said main valve having said auxiliary port opening through it, and having a seat for said auxiliary valve; closing means continually urging; said valves to close said ports; and thermostatic means, common to both said valves, constructed and arranged to open both said valves, and permit them to be closed, by said closing means, independently of said thermostatic means, in accordance with changes in temperature.

6. The method of coordinately calibrating multiple valve members including respective stems fitted for reciprocation in coaxial tele: scopic relation and respectively carrying annular disks having parallel )lane valve con tact faces; which consists 1n holding, said 7 members with said faces 1n predetermined spaced relation, with gauging means, while reducing the ends of said stemsto a common plane at a predetermined distance from said faces and at right angles to their common axis. and while maintaining said valve memhers at a substantially constant predetermined temperature.

7. The method of coordinately calibrating a multiple valve including respective stems fitted for reciprocation in coaxial telesco ic' relation and respectively carrying annu ar disks having valve contact faces; which consists in holding said members with said faces in predetermined spaced relation, while reducing the ends of said stems to a redetermined common plane at right ang es to their common axis.

8. The method of coordinately calibrating multiple valve members including respective stems fitted for reciprocation in coaxial telescopic relation and respectively carrying valve contact faces, extending transversely to their axes; which consists in holding said disk members in predetermined relation with gauging means, while reducing the ends of said stems to a common lane, at right angles to their axes and \vhii; maintaining said valve members at a substantially constant predetermined temperature.

9. The method of coordinately calibrating multiple valve members including respective stems fitted for reci rocation in coaxial telescopic relation an respectively carrying valve contact faces, extending transversely to their axes; which consists in holding said members with said faces-in predetermined relation, while reducing the ends of said stems to a common plane, transverse to their axes.

10. The method of coordinately calibrating multiple valve members includin respective stems fitted for reciprocation 1n coaxial telescopic relation and respectively carrying valve contact faces, extending transversely to their axes; which consists in holding said members with said faces in predetermined relation, while reducing the ends of said stems to a predetermined extent. 7,

11. The method of calibrating a thermostatically controlled valve structure which consists in providing a valve casing, having a valve seat, with a. metallic thermostatic tube rigidly connected with said valve seat; forming, at the free end of said tube, a seat for a closure cap at a predetermined distance from said valve seat; while maintaining the structure at a predetermined temperature; formin a closure cap to fit said closure seat in re etermined invariable relation thcrewit and rigidly connecting said closure cap with said tube in immovable water-tight contact with said closure seat.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this fifteenth day of April, 1925.

ARTHUR n PAIGE.

Ceruncate of Correction.

It is hereby certified that in Letters Patent No. 1,587,177, upon the application of Arthur E. Paige. of Philadelphia,

gganted June 1, 1926, ennsylvania, for an improvement in Thermostatically-Controlled Valves, errors appear in the printed specification requiring correction as follows; Page 3, line 97, ter the number 1,542,573 insert a parenthesis; page 4, line 92, for the misspe ed word fited roadfitt'ed; page 5, lines 17 to 19, strike out the words which distance is thus determined by accurate measurement during the formation of said'seat and insert the same before the word and in line 21; and that the said Letters Patent. should be read with these ccrrectionstherein that the same may conform to the record of the-case in the Patent Oflice Signed and sealed this can day of June, A. D. 1926.:

M. J. MOORE, Acting Uommiasiomr of Paton.

Oermicate of Correction.

It is hereby certified that in Letters Patent, No. 1,587,177, $anted June 1, 1926, upon the application of Arthur E. Paige of Philadelphia, ennsylvania, for an improvement in ThermostaticalIy-Controlled Valves, errors lippe'ar in the printed specification requiring correction as follows; Page 3. line 97, her the number 1,542,573 insert a parentheis; page 4, line 92, for the misspe ed word fited readfitied; page 5, lines 17 to 19, strike out the words which dietaince is thus determined by accurate measurement during the formation of said'seot end insert the same before the word and in line 21; and that the said Letters Pa tent should be read with these corrections therein that the same may conform to the record of the-case in the Patent Oflioe.

Signed and sealed this 29th day of June, A. D. 1926.:

[mm] M. J. MOORE,

Acting Uonuniuionar of Patents. 

